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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a confidence interval for the population variance σ2 and the population standard deviation σ. Use a 90% level of confidence. Assume that the population has a normal distribution .
n=21
s=16 grains per gallon
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